Free Tools from Bigsun Technologies
Free Online Calculators
Explore free, easy-to-use online calculators from Bigsun Technologies. From business and financial calculations to everyday planning, find practical tools to help you calculate faster and make informed decisions — completely free of cost.
Showing all 30 calculators
Loans & EMI
Work out monthly instalments and repayments before you borrow.
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EMI Calculator
Calculate the monthly instalment for a loan from the amount, interest rate and tenure.
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Home Loan EMI Calculator
Estimate the monthly EMI and repayment on a home loan.
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Car Loan EMI Calculator
Plan the monthly EMI on a car loan before you visit the showroom.
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Personal Loan EMI Calculator
Check the EMI on a personal loan for different amounts and tenures.
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Mortgage Loan Amount Calculator
Estimate how much mortgage loan you may be able to take.
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Down Payment Calculator
Find out how much to pay upfront when you buy a home or a vehicle.
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Savings & Investment
Project the growth of your savings, deposits and long-term investments.
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SIP Calculator
Estimate the future value of regular monthly investments in a systematic investment plan.
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Lumpsum Calculator
See how a one-time investment can grow over time.
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Compound Interest Calculator
Calculate how interest compounds on your money over time.
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CAGR Calculator
Find the compound annual growth rate of an investment between two values.
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Fixed Deposit (FD) Calculator
Estimate the maturity amount and interest on a fixed deposit.
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RD Calculator
Calculate the maturity value of a recurring deposit.
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PPF Calculator
Estimate the maturity value of your Public Provident Fund savings.
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Kisan Vikas Patra (KVP) Calculator
Calculate the maturity value of a Kisan Vikas Patra investment.
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Post Office Monthly Income Scheme Calculator
Estimate the monthly income from a Post Office Monthly Income Scheme deposit.
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SCSS Calculator
Calculate returns on the Senior Citizens Savings Scheme.
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Retirement Calculator
Plan how much you may need to save for a comfortable retirement.
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Business & Investment Analysis
Evaluate returns, project value and payback for business decisions.
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ROI Calculator
Measure the return on investment from the gain and the cost of an investment.
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NPV Calculator
Work out the net present value of future cash flows.
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Present Value Calculator
Find today's value of an amount you expect to receive in the future.
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Payback Period Calculator
Estimate how long it takes to recover the cost of an investment.
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GST & Tax
Calculate tax amounts quickly and accurately.
Salary & Employment
Salary, allowance and service-related calculations for employees and HR teams.
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Salary Calculator
Break down a salary into its components and estimate take-home pay.
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HRA Calculator
Calculate House Rent Allowance for your salary and rent.
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Gratuity Calculator
Estimate the gratuity payable based on salary and years of service.
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Statutory Bonus Calculator
Calculate the statutory bonus payable to an employee.
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Work Experience Calculator
Find your total work experience between joining and leaving dates.
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Everyday Calculators
Handy calculators for health and shopping.
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Need software that does the calculating for you?
Bigsun builds ERP and business software that automates finance, payroll, GST and reporting. Talk to our team about what you want to simplify.